Leno's 3.400 million viewers overall is his best for a week of rebroadcasts since Aug. 22-26, 2011. Fallon's 1.710 million viewers overall last week is his best for a full week of encores since Dec. 12-16, 2011. In viewers 18-49, "Tonight's" 1.040 million 18-49 viewers is its best for a week of all rebroadcasts since Aug. 22-26, 2011. "Late Night's" 642,000 viewers 18-49 is its best for a full week of encores since April 15-19, 2013.

Leno's week of encores topped ABC's "Jimmy Kimmel Live," which aired originals from Monday through Thursday, in viewers 18-49, total viewers and other key measures.

Fallon's week of rebroadcasts beat originals of CBS's "Late Late Show with Craig Ferguson," as well as ABC's first-run "Nightline" in their 12:30-1 a.m. ET head-to-head half-hour, in viewers 18-49, total viewers and other key categories.

Season to date, "Tonight" is off to its biggest start 11 weeks into a new TV season in three years in 18-49 viewers and in five years in total viewers. Fallon is delivering his biggest 18-49 and total-viewer audiences 11 weeks into the season in the five years he's been hosting "Late Night."

Versus the first 11 weeks of the year-ago season, Leno is up 10% in 18-49 viewers (with 1.133 million vs. 1.030 million) and up 10% in total viewers (3.806 million vs. 3.469 million). Fallon is up 21% in 18-49 viewers (804,000 vs. 665,000) so far this season and up 18% in total viewers (1.958 million vs. 1.665 million).

At 1:35 a.m. ET, "Last Call with Carson Daly" is also delivering sizable gains versus the first 11 weeks of last season, up 19% in 18-49 viewers (440,000 vs. 369,000) and up 11% in total viewers (978,000 vs. 882,000).

"Tonight" has now delivered bigger 18-49 audiences than "Late Show" for the last 55 weeks in a row and topped "Kimmel" for 44 of their 48 head-to-head weeks. In total viewers, Leno has out-delivered "Late Show" for 59 weeks in a row and "Kimmel" for 48 of 48 weeks.

Fallon has now generated bigger 18-49 audiences than "Late Late Show" for 60 of the last 61 weeks and prevailed in total viewers for 57 of the last 59 weeks. Versus "Nightline" in their head-to-head half-hour, Fallon has outdelivered the ABC series for 48 of 48 weeks in viewers 18-49 and 43 of 45 weeks in total viewers.

WEEKLY AVERAGES

(According to in-home viewing figures from Nielsen Media Research for the week of Dec. 2-6. Ratings reflect "live plus same day" data from Nielsen Media Research unless otherwise noted. Season-to-date figures are averages of "live plus seven day" data except for the two most recent weeks, which are "live plus same day.")